Here, we report that OsOFP19 negatively modulates brassinosteroid (BR) response and integrates it with cell division pattern to affect plant architecture, including grain shape, through interaction with both DLT (DWARF AND LOW-TILLERING) and OSH1 (Oryza sativa homeobox1)

Further studies revealed that OsOFP19 interacts with OSH1, and this interaction enhances the transcriptional activity of each other and leads to a transition from anticlinal to periclinal cell division